These loads are specially optimized for long shots at very large waterfowl. They are more lethal than any steel or non-toxic load, especially at longer distances. They are specially buffered to ensure a tight pattern, and the superior lethality of Hevi Shot pellets lets you shoot a smaller pellet size in order to send substantially more pellets after your bird. 3" - These magnum loads are designed for the hunter who wants more speed and energy and is willing to sacrifice a bit of pattern to get it. They still pattern far more tightly than any steel or non-toxic load. You can shoot a much smaller pellet size in order to send substantially more pellets after your bird.